Embedded Files
M 2/10
T 2/11
W 2/12
Th 2/13
🟢 5: M 2/10 - 📖 impulse problems
🟢 5: M 2/10 - 📖 impulse problems
Today, we'll first finish the Momentum Presentation we have been going through. Then, we'll practice impulse problems by completing 📖textbook Ch 9 impulse problems: #3, 12, 15, 17, 46, 47, 48.
Homework: Work on impulse problems above.
Optional Extra Practice: Page 1 in Momentum Packet (SOLUTIONS)
Here's a solution for one of the most complex examples 6.5 from this presentation. Note that the video ultimately finds the "force of impact," or the net force here which is the answer to part (b). However in part (c) of our problem, we're asking for the force that the ground exerts on the worker, so for that part, draw a free body diagram and rearrange ΣF = FN - Fg for FN .
🟩 5: W 2/12 - conservation of momentum
🟩 5: W 2/12 - conservation of momentum
Today, we’ll first discuss how we a system with no impulse will conserve momentum. We'll start by exploring momentum conservation in "explosions." Then, we'll continue to discuss elastic and inelastic collisions and then do a few problems. Remember that momentum is conserved in all collisions, but energy is only conserved in elastic collisions. Also remember that in a collision between two objects, each of the objects experiences an equal impulse (the momentum equivalent to Newton's 3rd Law).
Presentation: Collisions (we'll do some sample problems found here)
Homework: Review your notes.
If you need extra support on today's lesson or if you missed today's lesson for any reason, check out the following videos which could be helpful in catching you up on understanding collisions.
And here is another video which helps to illustrate the difference between elastic and inelastic collisions. Make sure you make it to the end of the video when he talks about the real-world caveat at around 6:00.
💚 5: Th 2/13 - collisions
💚 5: Th 2/13 - collisions
Today, we'll finish talking about elastic and inelastic collisions and then do a few problems. Remember that momentum is conserved in all collisions, but energy is only conserved in elastic collisions. Also remember that in a collision between two objects, each of the objects experiences an equal impulse (the momentum equivalent to Newton's 3rd Law).
Presentation: Collisions (we'll do some sample problems found here)
Homework: Optionally review the two videos below. QUIZ on Impulse and Momentum in 1-D on Thursday, February 20th.
Optional extra practice: pages 2 and 3 in Momentum Packet. (SOLUTIONS to Cons Momentum CompuSheet & SOLUTIONS to Momentum Practice Problems p 3)
In the following video, the chart is a useful method, but if you'd rather express the conservation of momentum as an equation like we did conservation of energy, that would be acceptable and probably faster. Focus on understanding the concepts of momentum conservation here.
Below is an example of how to solve a perfectly inelastic collision the equation way, which is preferred over the chart method.
Page updated
Google Sites
Report abuse